Sauna Den Ilp lies in a village in the polder a short drive north of Amsterdam and runs nine heat rooms: a Finnish sauna, an Aufguss Kelo sauna, a panorama sauna, a lemon sauna, a salt sauna, a herb temple, a caldarium, an infrared cabin and a steam cabin. It opens every day from ten in the morning until ten at night, and a day card costs 46 euro on weekdays and 48 euro at weekends. Swimwear is not permitted for hygiene reasons.